Collisional energy losses of heavy quarks in relativistic nuclear collisions at energies available at the BNL Relativistic Heavy Ion Collider

2011/10/06 by Yu. A. Tarasov, Tarasov, Yu. A.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Nuclear Theory (nucl-th) #hep-ph #nucl-th

paper · pdf · doi:10.48550/arxiv.1110.1211

8 pages, 3 figures

arxiv created 2011/10/06 · arxiv updated 2011/10/07

Abstract

We investigate the energy losses of b and c quarks at hard collisions with gluons and light quarks in quark-gluon plasma produced in central Au + Au collisions at RHIC energy(√s_NN = 200 GeV). As the coupling constant at hard collision in the perturbative QCD is limited by Landau pole at momenta Q² = Λ², we use the analytic models of QCD, where the Landau pole is absent. We calculate the energy losses of b and c quarks in analytic model of QCD at Q² ≥ Λ². At calculations we use the effective quasiparticle model. We use at calculations of total nuclear modification factor R_AA^b+c the fragmentation of b and c quarks into heavy hadrons with accounting theirs energy losses. We show that this factor gives the considerably suppression of heavy B and D mesons in the region of middle meanings of p_⊥. The experimental data \cite2 show, that nonphotonic electrons have the analogous suppression in the same region of p_⊥.

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